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Preparation method of porous micro-nano PET fibers

A micro-nano, fiber technology, applied in the field of textiles, can solve problems such as less research, achieve the effect of increasing porosity and specific surface area, simple and easy method, and improving interception effect

Active Publication Date: 2015-04-29
YIZHENG XINGHAI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

PET has good chemical stability and mechanical properties, and has been widely used in the fields of engineering plastics and chemical fibers. It has been reported that electrospinning PET to directly prepare micro-nano fibers, but the development of its multi-level structure, such as porous structure, needs to be studied. less

Method used

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  • Preparation method of porous micro-nano PET fibers
  • Preparation method of porous micro-nano PET fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The PET slices and polyvinyl alcohol (PVA) were first dried in a vacuum oven. Measure 20 mL of a mixed solvent of trifluoroacetic acid and methylene chloride with a volume ratio of 1:1 and a mass of 15.40 g and 13.30 g, respectively, in an iodine measuring bottle. Weigh 4.68 g and 0.77 g of PET and PVA, respectively, and make a mixed solution with a solution concentration of 16 wt%. Place on a magnetic stirrer and stir at room temperature for 9 h to obtain a homogeneous mixed solution. The composite fibers were prepared by electrospinning. The preparation conditions were as follows: the receiving distance was 16 cm, the spinning voltage was 20-25 kV, and the advancing speed was 0.001 mm / s. The prepared composite fiber membrane was extracted in distilled water at about 70 °C to a constant weight of the sample, rinsed with distilled water several times, dried naturally and then dried in a vacuum oven at 50 °C for 24 h to obtain micro-nano PET fibers with a porous structu...

Embodiment 2

[0021] The PET slices and polyethylene glycol (PEG) were first dried in a vacuum oven. Measure 20 mL of a mixed solvent of trifluoroacetic acid and dichloromethane with a volume ratio of 3:1 and a mass of 23.10 g and 6.65 g, respectively, in an iodine measuring bottle. 2.42 g of PET and PEG were weighed to prepare a mixed solution with a solution concentration of 14 wt%. Place on a magnetic stirrer and stir at room temperature for 6 h to obtain a homogeneous mixed solution. The composite fibers were prepared by electrospinning. The preparation conditions were as follows: the receiving distance was 16 cm, the spinning voltage was 20-25 kV, and the advancing speed was 0.001 mm / s. The prepared composite fiber membrane was extracted in distilled water at about 70 °C to a constant weight of the sample, rinsed with distilled water several times, dried naturally and then dried in a vacuum oven at 50 °C for 24 h to obtain micro-nano PET fibers with a porous structure. .

Embodiment 3

[0023] Dry the PET slices and polyvinylpyrrolidone (PVP) in a vacuum oven first. Measure 20 mL of a mixed solvent of trifluoroacetic acid and dichloromethane with a volume ratio of 4:1 and a mass of 24.64 g and 5.32 g, respectively, in an iodine measuring bottle. Weigh 3.02 g and 0.31 g of PET and PVP, respectively, and make a mixed solution with a solution concentration of 10 wt%. Place on a magnetic stirrer and stir at room temperature for 7 h to obtain a homogeneous mixed solution. The composite fibers were prepared by electrospinning. The preparation conditions were as follows: the receiving distance was 16 cm, the spinning voltage was 20-25 kV, and the advancing speed was 0.001 mm / s. The prepared composite fiber membrane was extracted in distilled water at about 70 °C to a constant weight of the sample, rinsed with distilled water several times, dried naturally and then dried in a vacuum oven at 50 °C for 24 h to obtain micro-nano PET fibers with a porous structure. . ...

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Abstract

The invention discloses a preparation method of porous micro-nano PET fibers. The preparation method comprises the following steps: using PET and polymer as raw materials, dissolving in a mixed solvent of trifluoroacetic acid and dichloromethane, and stirring and dissolving at room temperature to obtain a homogeneous solution; performing electrostatic spinning to obtain micro-nano composite fibers; placing the composite fibers in an extracting agent to remove the polymer until the sample is constant in weight, rinsing several times with distilled water, and drying to obtain the porous micro-nano PET fibers. The porous micro-nano PET fibers have a higher specific surface area, and improve the porosity and specific surface area on the basis of maintaining advantages of conventional electrostatic spinning PET; the preparation of porous structure can be completed only by the extraction process, so that the method is simple and easy to perform. Surfaces and inner parts of the fibers have independent through holes, and the size and number of holes can be controlled according to a mass ratio of PET to another added polymer, so that the porous micro-nano PET fibers with different specific surface areas and porosities can be obtained and are applied to the filtration field to better improve the micro-nano-particles interception effect.

Description

technical field [0001] The invention provides a simple preparation method of porous micro-nano PET fibers, which belongs to the technical field of textiles. Background technique [0002] At present, micro-nanofibers prepared by electrospinning have attracted extensive attention in the fields of catalysis, medicine, and filtration due to their high specific surface area and porosity. PET has good chemical stability and mechanical properties, and has been widely used in the fields of engineering plastics and chemical fibers. It has been reported that electrospinning PET to directly prepare micro-nano fibers, but the development of its multi-level structure, such as porous structure, needs to be studied. less. In order to further expand the application field of electrospun PET fibers, increase its porosity and specific surface area on the basis of maintaining its good mechanical properties, and prepare micro-nano fibers with a porous structure, which will make it useful in cat...

Claims

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Application Information

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IPC IPC(8): D01F8/14D01F11/08D01F6/62D01D5/00B01D39/04
Inventor 王利娜李思雨石素宇辛长征王延伟
Owner YIZHENG XINGHAI CHEM FIBER
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